High-quality materials and good conductivity: High-current collecting rail is reinforced fireproof ABS base, fibreglass reinforced nylon base, which ensures excellent mechanical strength and durability; stainless steel screws and nuts for improved corrosion and rust resistance in salt water or corrosive environments; the distributor block bus box is made of tin-plated pure electric copper, the maximum current is brass tape. Ideal for Automotive, Solar and Marine Applications: Terminal busbars are suitable for power systems such as RVs, solar panels, cars, trucks, yachts, boats, etc. Whether you need to consolidate, distribute or protect your electrical system, the dc busbar can collect all wiring harnesses and properly store cables in vehicles and boats. 2 pieces 4 x M8 ‎BusBar Box: You will have durable collecting rails are 4 x M8 bolts, you have many connection points for the red positive pole and the black negative pole with 5/16 inch holes, modular box design, removable for easy wiring configuration. Product Details: Black car power distributor is connected to the negative pole, red is connected to the positive pole; the rated current of each bolt is 62.5 A, the rated current of the entire electrical block is 250 A; the current of the auxiliary terminal screw is 20 A. The maximum voltage is 48 V DC. No more mess: With these power distribution blocks, you can finally organise your wiring so that it no longer looks like a messy pile under the bonnet. Bring order to your power distribution systems.